812636586054721 has 8 divisors (see below), whose sum is σ = 863876308262400. Its totient is φ = 762243801404400.

The previous prime is 812636586054661. The next prime is 812636586054763. The reversal of 812636586054721 is 127450685636218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812636586054721 - 2¹³ = 812636586046529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812636586154721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211734387361 + ... + 211734391198.

It is an arithmetic number, because the mean of its divisors is an integer number (107984538532800).

Almost surely, 2^{812636586054721} is an apocalyptic number.

It is an amenable number.

812636586054721 is a deficient number, since it is larger than the sum of its proper divisors (51239722207679).

812636586054721 is a wasteful number, since it uses less digits than its factorization.

812636586054721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423468778679.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 812636586054721 in words is "eight hundred twelve trillion, six hundred thirty-six billion, five hundred eighty-six million, fifty-four thousand, seven hundred twenty-one".